Constant volume sampling system water condensation

Technical Report · Fri Oct 01 00:00:00 EDT 1993

OSTI ID:5492186

Black, F M; Snow, R

Combustion of organic motor vehicle fuels produces carbon dioxide and water (H2O) vapor as well as products of incomplete combustion, like hydrocarbons and carbon monoxide. The Constant Volume Sampling (CVS) system, commonly used to condition auto exhaust for sampling and analysis, provides for controlled ambient air dilution of the engine exhaust. Water condensation can be a problem during CVS system sample conditioning, depending upon vehicle fuel composition and fuel economy, and diluent air humidity and exhaust/diluent ratio. The paper describes a 'spreadsheet' procedure for detailed, second by second, determination of diluted exhaust dew point and the necessary CVS system flow rates to avoid H2O vapor condensation.

• Research Organization: Environmental Protection Agency, Research Triangle Park, NC (United States). Atmospheric Research and Exposure Assessment Lab.
• OSTI ID: 5492186
• Report Number(s): PB-94-114899/XAB; EPA-600/R-93/207
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
54 ENVIRONMENTAL SCIENCES
VAPOR CONDENSATION
RESEARCH PROGRAMS
COMPRESSED GASES
FUEL SUBSTITUTION
NATURAL GAS
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GASES
330700* - Advanced Propulsion Systems- Emission Control
330800 - Emission Control- Alternative Fuels
540120 - Environment
Atmospheric- Chemicals Monitoring & Transport- (1990-)